Depositing method for the masses of sand and gravel obtained in browncoal open workings



Apr. 24, 1923. 1,452,994

MASSES 0F SAND AND GRAVEL OBTAINED IN WEBER BROWN COAL OPEN WORKINGSFiled Jan. 22

DEPOSITING METHOD FOR THE Patented Apr. 24, 1923.

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WILHELM WEBER, or wrEsBAnnii, GERMANY, ASSIGNOR r0 THE rrnivr GEWERK-sonar'r I-IAUSBACI-l n, or wrnsnannn, GERMANY.

DEPOSITING METHOD FOR MASSES OF SAND AND GRAVEL OBTAINED IN BROWN- COALOPEN 0V0RKINGS.

Application filed January 22, 1921. Serial No. 439,274.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. I,1313.)

To a? Z '20 7mm it may 00% earn:

Be it known that I, VILHELM lVnnnn, a citizen of the German Republic,residing at \Viesbaden, Germany, have invented certain new and usefulImprovements in a Deposit ing Method for the Masses of Sand and GravelObtained in Brown-Coal Open lVorkings (for which I have obtained inGermany a patent, No. 311,544, dated 28th of March, 1918), of which thefollowing is a specification.

This invention relates to the deposition of masses of sand and gravelproduced in brown-coal open workings and carried away by water.

The invention has for its object to form first by the waste material adam which shuts the dumping site off the browncoal open working and todeposit afterwards the sand and gravel carried away by water at the endof the dumping site which is farthest away from said dam. r he dumpingsite is traversed by channels covered by brushwood designed to retainthe sand and gravel so that the water can collect in the channels to beconducted to the main chan nel which surrounds the site.

In order that the invention may be clearly understood, I shallhereinafter describe the same with reference to the form of constructionshown by way of example onthe accompanying drawing, wherein 2- Fig. l isa plan view of the dumping site.

Figs. 2 and 3 are cross sections on lines 22, 4l4- respectively of Fig.1.

Fig. 4 is a plan view of Fig. 3.

The part of the old workings or the dumping site to be utilized for thedeposition of the waste material is fenced at the side turned towardsthe open workings with a double walled boarding (1 and 3). Theseboardings are covered at the side turned towards the dumping site with alining of wire netting or of sack cloth designed to separate the sandfrom the water by filtering. The two walls of the boarding are 2-3meters distant the one from the other.

In the interval between the two walls of the boarding, 23 meters apartfrom each other, filter doors 6 are arranged which are of the sameheight as the boardings and consist of plaited brush wood sustained andconnected with the boardings by means of lateral poling boards. Thenumber of filter doors depends on the size of the dam to be formed.

Under each filter door 6 a ditch 11 is provided which is designed toreceive the water. These ditches are connected outside the fence (at theside of the open workingsl with the main ditch 10 which goes along twosides of the dumping site. At the inner parts the ditches 11 branch offto a ditch system which extends over the deepest parts of the wholedumping site. The ditches 11 are covered by brushwood plaiting or byboardings 12 with wire netting 1.3.

The arrangements just described are shown in the drawing and by thesections 22 and 4-4.

The working method is as follows The dumping site is prepared after themanner described, whereupon the flushing conduit through which the sandand gravel is carried in water and which branches oif from the main at fis placed upon the filter doors between the two walls of the boarding sothat it reaches to the end of the same. The waste sand and gravel nowflow out of the conduit 9 into the farthest division until the intervalbetween the walls is completely filled by a dam of uniform widththroughout, whereupon the next fol lowing division is filled up in thesame manner. Only after in this manner a dam has been produced thedischarge on the dumping site is started at point 9. This point 9 is asdistant as possible from the dam. The material floods the site and thewater which has served for conveying the material separates from thesand in filtering through the covers 12-12 into the ditches 11 throughwhich it flows into the main ditch 10.

The characteristic features of the invention consist in producing a dambetween the dumping site and the open workings by the waste materialwhich is conducted between a double walled boarding in which a channelfor the water is provided which filters out of the material and furtherin separating the water from the solid material as soon as the mixturearrives upon the dumping site so that the pressure from the dumpedmasses is kept back from the dam, this purpose being ttained by theditchsys tem. The ditches serve also to ensure the draining of the fieldafter the same has been completed.

, I claim:

An improvedamethod for depositing the masses of sand and gravel obtainedin brown-coal open workings consisting in conducting the mixture ofsand, gravel and water coming from the open working first between twoboardingsstanding at a de termined distance the one from the other andextending between the open workings and the dumping site so that a'highdam of sand and gravel is erected between the boardings, whereupon themixture of sand, gravel and water is conducted to a point of the fieldwhich is situated at a large distance from the dam so that the Water hasseparated from the solid admixtures long before the deposited materialreaches the dam and in draining the dumping site of the water by meansof ditches arranged at the lowest parts of the flushing field.

In testimony whereof I affix my signature in presence of two witnesses.

VILHELM EBER.

